Valve re-seating tool



Jan, 19, 1932. 1.. s. DAVi$- ,938

VALVE RES EATING TOOL Filed May 21, 1929 gnmntoz Patented Jan. 19, 1932PATENT LEO S. DAVIS, 0F MONTESANO, WASHINGTON I VALVE IRE-SEATING TOOLApplication filed May 21,

This invention relates to a tool for use in reseating flat surfacevalves of the type used in connection with water and other pumps.

The primary object of the present invention is to provide a tool whichmay be applied to the valve while the same is upon its seat and whichwill rotate the valve upon the seat to smooth the underface thereof andthe face of the seat upon which it positions.

Another object of the invention is to provide a tool of the abovedescribed character by means of which a regulated pressure of the valveagainst the seat during the reseating operation may be maintained.

Still another object of the invention is to provide a reseating tool forflat surface valves which is of simple but strong and durableconstruction and. adapted to be easily and quickly applied to or removedfrom position.

The invention will be best understood from a consideration of thefollowing detailed description taken in connection with the accompanyingdrawings forming a part of the present invention with the understanding,however, that the invention is not confined to any strict conformitywith the showing of the drawings but may be changed or modified so longas such changes or modifications mark no material departure from thesalient features of the invention as expressed in the appended claims.

In the drawings Figure 1 is a view in side elevation of the valvereseating device embodying the present invention. V Figure 2 is anenlarged longitudinal sectional view through the device and through aportion of a pump showing the application of the device to the pumpvalve.

Referring to the drawings in detail wherein like numerals of referenceindicate corresponding parts throughout the several views, the numeral 1indicates a portion of a water pump showing a removable valve seat 2supporting a valve 3 of the type upon which the present tool is designedto be used.

In the application of the reseating tool embodying this invention, theusual stem which is attached to the central portion of the valve seat inthe threaded passage 4, and

1929. Serial No. 364,840.

the spring which is connected to the stem and holds the valve 3 inposition, is removec, and the guide stem of the present tool which isindicated as a whole by the numeral 5 has the threaded lower end 6thereof engaged in the aperture of the valve seat, in the manner shown.A substantial part of the upper end of the stem 5 is also threaded asshown and the upper end of the stem is squared as inditure 8 of amilling cutter which is indicated generally by the numeral 9. Thiscutter 9, as shown, is in the form of a round flat plate, the underfaceof which is formed to provide a series of radially extending teeth 10which bite into the top surface of the valve 3 when the tool is appliedthereto. The upper face of the cutter 9 is centrally recessed to receivea driving plate 11, the upper face of which is formed to provide anannular series of ratchet teeth 12 which are engaged by siniilarlyformed teeth 13 about the lower edge of an upright driving sleeve 14through the central portion of which the stem 5 passes.

Surrounding the guide stem 5 in the lower part of the driving sleeve 14is an inner or guide stem sleeve 15, the lower end of which rests uponthe ratchet driving plate 11, in the manner shown. The lower end of thissleeve 15 is surrounded by a bearing 16 which rests upon the driver 11,and supports a compression spring 17.

The driver plate 11 is secured to the milling cutter by suitable screwspassii through the bottom of the cutter each indicated at 18.

The inner wall of the ratchet drivin sleeve 21. This washer 22 is heldin place and moved up or down upon the stem 5 by a feed nut 24, theupper end of which is provided with a knurled flange 25.

As shown, this feed nut engages the leads upon the upper end of the stem5 and is worked up and down thereon to increase or decrease thecompression of the spring 17 and 21, as previously explained.

From the foregoing description it will be readily seen that when thevalve reseating machine is in position in the manner shown, upon avalve, by manipulating the nut 24, the relatively heavy compressionspring 17 may be placed under tension to force the milling cutter 9firmly down against the top face of the valve to cause the teeth 10thereof to engage and hold the valve, the stem 5 by reason of itsconnection with the head 2 acting to prevent the spring lifting the toolaway from the. valve. At the stone time that the compression spring 17is pres ,l down by the nut 24, the light spring 21 will also be placedunder compression to more firmly engage the ratchet driver plate.

By applying a wrench or other suitable tool to the polygonal shapedupper end of the sleeve 14, the sleeve may be rotated to cause rotationof the milling cutter and of the valve engaged thereby, thus working theunderface of the valve upon its seat to smooth and make the same conformto the surface of the seat upon which it rests.

Having thus described my invention what I claim is 1. A flat surfacevalve resenting tool comprising a seat engaging stem, a valve ongagingmember rotatable about the stem, a sleeve surrounding said stem andcarried by the member, a resilient element surrounding the stem andsupported upon said member, a resilient element surrounding the stem andsupported by the sleeve, means carried. by and shiftable on the stem forcontrolling the tension of said resilient elements, and a ratchetconnection between the lower end of said sleeve and the valve engagingbody.

2. A valve resenting tool, comprising a stem, means for mounting saidstem in working position relative to the valve seat, a member rotatableabout the stem having teeth in the under-face adapted to engage a valverestin on the seat, a member surrounding the stem having ratchet toothconnection with the valve engaging member, a pair of elements upon theupper end of said stem one arranged above the other, the upper one ofsaid elements having threaded connection with the stem, and a pair ofspring members surrounding the stem each bearing at its upper endagainst the underface of the under one of said elements and one bearingat its lower end against the valve engaging member, the other springhaving connection with and forcing said second mentioned memberdownwardly into firm engagement with the valve engaging member.

3. A valve reseating tool, comprising a stem, means for mounting saidstem in working position relative to the valve seat, a valve engagingbody surrounding the stem and having teeth upon the under-face thereofto bite into an underlying valve on the seat, a sleeve surrounding thestem having ratchet tooth connection with the valve engaging body, apair of superposed members disposed at the upper end of said stem andhaving the stem passing therethrough, the upper one of said membershaving threaded connection with the stem, :1 pair of antifrictionelements one carried by the valve engaging body and the other carried byand within said sleeve, a spring member surrounding the stem and inengagement at its upper end with the lower one of the elements at theupper end of the stem and bearing at its lower end upon one of theanti-friction elements, and a second spring surroundim the first springand hearing at its upper end against the said lower one of the elementsat the upper end of the stem and at its lower end against the other ofthe anti-friction elements.

4. A valve reseating tool, comprising a stem, means for mounting saidstem in working position relative to the valve seat, a valve engagingmember mounted for free rotation about said stem, an actuating memberfor the first mentioned member surrounding the stem and supported by thevalve engaging member, a ratchet connection between said members, and apair of compression springs surrounding said stem and disposed onewithin the other and further having connection at one end with the stem,one of said spring members exerting pressure upon the valve engagingmember and the other sprin member exerting pressure upon the SGCOINmentioned member.

V 5. A valve resent-ing tool, comprising a stem, means for mounting saidstem in working position relative to the valve seat, a valve engagingmember mounted for free rotation about said stem, an actuating memberfor the first mentioned member surrounding the stem and supported by thevalve engaging member, a ratchet connection between said members, a pairof compression springs surrounding sa-idstem and disposed one within theother and further having connection at one end with the stem, one ofsaid spring members exerting pressure upon the valve engaging member andthe other spring member exerting pressure upon the second mentionedmember, and means adjustably mounted upon the stem for increasing ordecreasing the compression of said springs.

In testimony whereof I hereunto aliix my signature.

LEO S. DAVIS.

